initial commit
outline of tasks.

Taken from ruby implementation.
find version of installed gnuplot
get command line arguments
find source and destination in args
assert source directory exists
create destination directory if it doesn't exist
find summary files
define target resources
group data by command
create temporary workspace
remove periods and forward slashes from gorup name
write histogram data to file based on group and resource
build template for gnuplot
call gnuplot to create each histogram
use reasonable binwidths for histograms
add name option
store filename in summary dictionary
fill in table
extract some methods